Improvement in dental pluggers



' line l 2, Fig. 1.

vtNITED STATES PATENT QFEIGE SAMUEL D. STROHM, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF HIS RIGHT TO VVILLIAll'IFI.l 'WRIGHL OF SAME PLAGE.

IMPROVEMENT IN DNTAL PLUGGERS.

Specification forming partof Letters Patent No. 170, l 29, dated November 16, 1875; application led' October 2 1875.

ceed to describe, reference being had to the accompanying drawing', in which- Figure l is a vertical sectional view of. my improved attachment for dental plugging-instruments, and Fig. 2, a sectional plan on the Ordinary dental pluggers, in which the tool is arranged in line with the stem of the instrument, are objectionable, because of the difficulty and inconvenience which are experienced in applying the tool so arranged to certain parts ot' the mouth. This defect has been overcome by constructing an instrument with a tool-carrying spindle arranged at right angles to the operating-spindle; but this plan is also objectionable, as it is only adapted for certain classes of work, and necessitates the luse, in addition, oi' an ordinary straight plug-.

ger. I overcome all these objections by the construction of an attachment having au operating and aV tool-carrying spindle arranged at right angles, or thereabout, to each other, and adapted for ready connection to or disconnection fromthe operating-spindle of an ordinary plugging-instrument.

The attachment consists oi' a casing having two tubular arms, A and A', arranged at right angles, or thereabout, to each other, the

arm A carrying a spindle, B, and the arm A' a spindle, D. Motion is communicated from one to the other of these spindles by the intervention of a lever, E, arranged at the intersection of the arms'A and A', and hung loosely to a pin, h. The lever E has two faces,

` atyright angles, or thereabout, to each other,

against one of which faces bears the end of the spindle B, and against the other `that of the spindle D, the parts being held in contact with each other, and lost motion being prevented by the action of a spring, e, coiled round the spindle D, and bearing at one end against the angef, and at -the opposite end against a screw-plug, b, which closes the'end of thetube A'.l

The spindle B is reduced in diameter at its outer end, Where it bears against a shoulder, a, on the casing, and this reduced portion is threaded, as shown, or provided with other means by which it may be connected to the end of the operating-spindle of a straight plugger, to Which the tool is ordinarily attached, the socketed end of the arm A being adapted to the casing of said instrument.

When the attachment is to be usedin connection with an electric plugger, the spindle B is connected tothe end ot the rod which receives the blow of the electric hammer.

I wish it to be understood that I do not desire to claim, broadly, an electric plugginginstrument in which the tool-carrying spindle is arranged vat right angles, or thereabout,

to the operating-spindle; but

I claim as my invention- 1. The within-described attachment for dental plugging-instruments, consisting-of a casing having two spindles at right angles, or thereabout, to each other, one of said spindles carrying the plugging-tool, and the other being arranged for attachment to the operatingspindle of an ordinary straight plugging-instrument, substantially as set forth..

, 2. rlhecombination of the casing A A', spindle B, lever E, and spindle D, having a ange, with the coiled spring e and screw-plug b, adapted to the end of the arm A' of the casing, as set forth.

In testimony whereof I have signed my name tothis speciiication in the presence of two snbscribin g witnesses.

SAMUEL D. STROHM. Witnesses:

JOHN M. DEEMER,

HARRY SMITH. 

